撰写公文中，常用的论证方法有什么？
参考答案：
例证法、对比法、因果法。
商港按其不同的使用目的，分为海湾港、河口港、内河港。
Do you know_____ ? Sorry,I’ve no idea.
A．who is she waiting for
B．how is she coming
C．Why was she late for
D．what she is doing that for
